Writing a Fill tool
Author
Anyone know a clean way to write a fill tool, or at least know a tutorial that might suggest how? I only need a real simple one, zero fill tolerance, etc... But frankly I''m clueless how to write one that wouldn''t be a total mess. Maybe that''s how they always are, but I figured I''d check. Thanks!
Arek the Absolute
Assuming you mean graphics filling...
simplest way would be to use already written GDI functions to do it. e.g. ExtFloodFill(), GradientFill(), FillPath() etc.
Algorithmically, doing it yourself, the simplest algorithm I can think of is the old Amiga hardware style one (off the top of my head...):
--
Simon O'Connor
Creative Asylum Ltd
www.creative-asylum.com
Edited by - S1CA on February 20, 2002 2:13:23 PM
simplest way would be to use already written GDI functions to do it. e.g. ExtFloodFill(), GradientFill(), FillPath() etc.
Algorithmically, doing it yourself, the simplest algorithm I can think of is the old Amiga hardware style one (off the top of my head...):
for (y=0; y<height; ++y){ bool fill = false; for (x=0; x<width; ++x) { if (image[x][y] == outlineColour) { fill = !fill; } if (fill) { image[x][y] = fillColour; } }} --
Simon O'Connor
Creative Asylum Ltd
www.creative-asylum.com
Edited by - S1CA on February 20, 2002 2:13:23 PM
if you want a border fill, or something like that, then the easiest thing to do is recusion.
off the top of my head,
ofcouse this is not optimised, and will overflow the stack on big areas, so you need to modify it a bit.
off the top of my head,
int fill(int atx, int aty, int fillColor, int borderColor){ if ( color[x][y] != borderColor) color[x][y] = fillColor; else for(int x = atx - 1; x < atx+ 1; x++) for (int y = aty - 1; y < aty + 1; y++) if (x != atx && y != aty && color[x][y] != fillColor) fill(x,y,fillcolor,bordercolor);} ofcouse this is not optimised, and will overflow the stack on big areas, so you need to modify it a bit.
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